Bytownite and Austinite Physical Properties

Bytownite

Austinite

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Physical Properties

Tenacity

Brittle

Solubility

Easily soluble in cold dilute HCl

Durability

Specific Gravity

2.72-2.754.12

1 7.18

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Fracture

Uneven

Cleavage

Perfect on [001], good on [010], imperfect on [110]

Good in two directions parallel to the prism faces {110}

Mohs Hardness

6-6.54-4.5

2 10

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Chemical Composition

Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

CaZn(AsO4)(OH)

Bytownite and Austinite Chemical Formula

While comparing Bytownite and Austinite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Bytownite and Austinite chemical formula.

Chemical formula of Bytownite- Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Austinite- CaZn(AsO4)(OH)

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Bytownite and Austinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bytownite and Austinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bytownite and Austinite Optical Properties during the identification of gemstone. Specific gravity of Bytownite is 4.12 whereas that of Austinite is 4.12.